There are only three more episodes of Supernaturalremaining, and this week's installment will delve into the twisted nightmares of our favorite characters. The episode, entitled "Dream a Little Dream of Me," finds Bobby slipping into a coma due to a demented dream walker, and Sam and Dean attempting to save him before time runs out. The episode promises to reveal more of Bobby's personal demons, and will also show why the man became a hunter.

The CW has provided an exclusive clip of the new episode, which will air this Thursday at 9pm on the CW.

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The clip starts off with Bobby in a coma and Dean by his side. Sam (Jared Padalecki) comes in with a handy file of monster lore and explains the legend of dream walkers. Apparently if you dose yourself with a concoction from a particular root, you can gain the ability to enter people's dreams and change them however you please. These people are able to turn good dreams into nightmares, and with enough of the root they can basically become Freddy Krueger. The clip ends with a horrifying moment inside Bobby's dream world.

In our recent interview with Supernatural creator Eric Kripke, he promised that this would be a fairly emotional episode that would also provide an intense character revelation for Dean (Jensen Ackles). My guess is that we'll be seeing some of his fear over the possibility that he may become a demon, which is something he learned from Ruby (Katie Cassidy) in last week's episode.